Brush



Oct. 30, 1934. R J, DUNN v 1,978,489

BRUSH Filed Nov. 29, 1953 fnven tor Roberz J Dum? Patented Oct. 30, 1934 i UNITED STATES PATENT oFFicE n BRUSH Robert J. Dunnghicago, A pplicationNovember 2.9, A19733, Serial No. 700,192 ,-sciaims (or 11i-19e) of a brush or otherlike surface-treating or cleaning andfpolishing apparatus kand especiallyl-to provide an improved mounting forburnishing brushes; and to provide an improved methodffor making the brush mounting and for'anchoring metallic bristles or tufts of bristles thereinV sothat the bristles `will not workloose'or be dislodged from the mounting when the vbrush is in use.

Another object'of thepresent invention is to provide a brush including a hub and-mounting structure whichwill not shrink `when'wet or crack or otherwise becomeV ruptured when in use, which has'ib'een an objected feature ofthe prior 4art brushmounts. i f Other objects wlllappear hereinafter.`

The drawing illustrates several typical and preferred embodiments Vof the invention, and

therein: i. I i i Y Fig. 1 is an elevational view of a ytypical brush embodying a preferred form of invention, `made according to the method thereof; x Figi-Zie a transverse sectional view on line 2--2 inFignl; A i I -Fig.'3 is a'sectional view similar.` to Fig. 2, but showing the `bristle `mounting of the brush prior tothe pouring. thereinto of the anchoringiiller body; l 4

Fig. 4 is a sectional view on line 4`4 in Fig. 2; Fig. 5 is asectionalview illustrating a modified form-of brush made according to the method of theinvention;

.` Fig; 6' is afsectional View illustratinganother modiiied form4 of brush made according tothe method of the invention; and

Fig. '7 is a sectional view illustrating a modification of the invention. i v

i In the typical and preferred embodiment of the invention shown in Figs. 1, 2 and 3 a brushstructure is generally indicated at 10. In its prefer-red formthebrush 10 has the form of a burnishing brush and has tufts of soft metallbristles 11, but thestructure and method hereinafter to be described are equally applicable to other forms l'of brushes, 'surface treating apparatuses, cleaning and` polishing apparatuses, and the like which haveimetallic bristles, and theltermbrush as used hereinafter' is generic to the several types of apparatus mentioned and isrso. tov'be `construed lhereinafter and .intheclaims fr l c t The brush 10 includes a metallic bristle mounting andkhub structure, generally indicated at 12, and comprising an annulus or ring 13. Formed integrally with the ring 13 at the center thereof is a `hub `or core 14 having a centrally disposed bore 60 or opening 15 formed therein Vso thatA the hub may be mounted upon a spindle arbor or the like, for rotation-thereby.

Formed integrally with the hub l14 and ring 13 and extending therebetween about midway between the axial endsof the ring -13 is an annular `web or wall`16 inwhich is formed an annular row of radially arranged anchor holes or openings 17 (Fig. 3)'.

` Extendingtransversely or laterally through the ring 16V and spacedradially therearound are annular rows of openingsor anchor holes 18.

.In the manufacture of the brush 10 the tufts of soft, metallic `bristles 11 are bent or looped midway'between their ends and the looped end portions'or-bases 19 of the bristles are thenprojected through the holes 18 in the ring 13 into the in- Vterior of the ring' 13 `(Figs. 2,3 and 4). A iiexible tying'or binding element in the form of a small flexible wire 20 is then extended around each row of holes 18, inside ofthe ring 16, through the looped end portions 19 of the tufts of bristles 11; each Aof these anchoring elements or wires 20 being -.tied at its ends, as at.21.

l A molten filler 22, preferably of soft metal or metallic alloy,`is then poured into the ring 16 substantially to fill the latter; the iiller flowing into the holes 17 to close the flatter, thereby securely anchoring ithe' filler body 22 tothe ring 13vand wall 16; While at the same time the filler 22 flows into 'and around the looped end portions 19 of theibristle tuftsas shown in Fig. 2, and thereby 'securely anchors the metallic bristles 11 to the brush' mounting 12 and against displacement therefrom by centrifugal or other forces acting on the bristle tufts to dislodge the same from the brushing mounting 13 when the brush is in use and rotatingat high speeds. After the filler pouring 0peration, the filler body 22 and the bore 15 may bedrilled out and there will then be left in the filler body 22 at opposite ends of the bore 15 openings 23 which are coaxial and continuous with the bore 15 for the reception of a spindle or the like, upon which the brush may beimonted for rotation thereby.

ASubstantially the same vmethod as that hereinbefore described is practiced in making the modi- Iicatio'ns `of Figs.'5 and fwhich differ from the brush shown in Figs. 1 to 4 inclusive principally only as to form or design 110 In the modification shown in Fig. 5 the brush mounting is generally indicated at 24 .and includes a substantially cup-shaped member 25 which has annular side walls 26 and an end wall 27 at one end thereof. In this form of the invention the looped end portions 28 of the tufts of metallic bristles 29 are projected through annular rows of angularly extending openings 30, formed in the member 24, into ,the cup-shaped interior of the member 24 wherein they are tied by flexible tying or anchoring elements in the form of wires 3l, each of which is extended through all the looped end portions 28 of the.

tufts of bristles 29, thereby securely anchoringthe tufts of bristles to the mounting 24. Finally a centrally disposed bore 32 is drilled through the filler body 32 coaxially and continuous with the preformed opening 34 in the wall 27 of the member 25 to receive a spindle or the like upon which the brush may be mounted.

Substantially the same method as that hereinbefore described is also followed in making the modied form of the invention shown in Fig. 6 and which is generally indicated at 35. This form of the invention likewise comprises a bristle or brush mounting 36 which includes a cupshaped memberV 37. This cup-shaped member 37 includes side walls 38 and an end wall 39 and extending through these walls 3 8 and 39 are angularly extending openings 40. The looped end portions 41 of the tufts of soft metallic bristles 42 are projected through the openings 40 into the interior of the cup-shaped member 37 Wherein they are tied by flexible anchoring elements in the form of wires 43, after the manner hereinbefore described in connection with the forms of the invention shown in Figs. 1 to 4 inclusive and Fig. 5.

A filler body 44 of soft metal or like equivalent material is then poured into the cup-shaped member 37 so that it flows into, around 4and between the looped end portions 41 of the bristle tufts 42, thereby securely anchoring the tufts of bristles 42 to their mounting 36.- A centrallydisposed and tapered opening 45 is thenl drilled through the soft core or filler body 44 for the reception of a spindle, arbor shaft or the like upon which the brush may be mounted for rotation.

The modication of the invention shown in Fig. 7 comprises a hand brush generally indicated at 46 and including soft metallic bristles 47 which have their looped end portions 48 projected into recesses 49 which are formed in and extend transversely through the brush mounting 50; the recesses 49 being arranged in annular rows. Each of these recesses 49 has a constricted neck portion 5l and extending around each row of recesses 49 and projected into the constricted neck portions 51 thereof is a flexible tying or anchoring element in the form of a wire 52. These wires 52 are projected through the looped end portions 49 of the bristle tufts 47 and their ends are tied together on the opposite side of the brush mounting 50 from the bristles 47.

The metallic ller body, such as 22, in the brush mounting effectively cooperates with the body or tying elements or wires, such as 20, to anchor the inner end portions or bases, such as 19, of the bristles in the mounting and against dislodgement therefrom and, inthe case of the.

brush shown in Figs. 1 to 4 inclusive the web 16 and anchor holes 17 therein cooperate with the filler body 22 to anchor the latter in the mounting. And it will be found that when a brush and mounting constructed according to the present invention are in use the same will not shrink, 4as do the prior art wooden brushes when wet, nor will it crack or otherwise become ruptured as do the prior art brushes and their mountings.

It may be found desirable, for the sake of lightness, to make the entire brush mounting, such as 12, except the filler 22, of wood or other equivalent material that is lighter than metal and in this case the molten filler 22 would be poured into the hollow interior or core of the mounting as,

for example, into the ring 13, to complete the to be limited to the precise details of constructionl set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

Having thus described my invention what IA claim as newA and desire to protect by Letters Patent is:

1. Abrush comprising a substantially annular mounting having rows of radially arrangedholes or openings formed therein, and said holes extending between the radially outer and radially inner surfaces of said mounting; said mounting having an integral transverse web extending thereacross between its axial endsfand said web having axially extending anchor holes or openings formed therein; rows of bristles having'butts extended through said radially extendingholes into the interior of said mounting; a flexible tying member extended through the butts of the'bristles in each of said rows of holes; and a relatively soft filler body in said mounting and substantially filling the same and cooperating with said tying members to anchor said bristles' to said mounting; said filler body being interspersed through said anchor holesto anchor said ller body in said mounting and to said web.

' 2. A brush comprising a substantially annular mounting having rows of radially arranged holes or openings formed therein, and said holes extending between the radially outer and radially inner surfaces of said mounting; said mounting having an integral transverse web extending thereacross between its axial ends and'said web having axially extending anchor holes or openings formed therein; rows of bristles having butts extended through said radially extending holes into the interior of said mounting; a flexible tying member-extended through the butts of the bristles in each of said rows of holes; and a relatively soft llerbody in said mounting and substantially lling the same and cooperating with said tying members to anchor said bristles to said mounting; said ller body being interspersed through said anchor holes to anchor said filler body in said mounting and to said web; said web having an enlarged centrally arrangedportion projecting from the axial sides thereof and providing a core for said mounting; said core having an axially extending opening formed therein for the reception of a supporting member for the brush.'

3. A brush comprising a substantially annular mounting having rows of radially arranged holes or openings formed therein, and said holes ex tending between the radially outer and radially inner surfaces of said mounting; said mounting having an integral transverse web extending thereacross between its axial ends and said web having axially extending anchor holes or openings formed therein; rows of bristles having butts extended through said radially extending holes into the interior of said mounting; a exible tying member extended through the butts of the bristles in each of said rows of holes; and a relatively soft ller body in said mounting and substantially lling the same and cooperating with said tying members to anchor said bristles t'o said mounting; said filler body being interspersed through said anchor holes to anchor said ller body in said mounting and to said web; said web having an enlarged centrally arranged portion projecting from the axial sides thereof and providing a core for said mounting; said core having an axially extending opening formed therein for the reception of a supporting member for the brush; and said iiller body having axially extending openings formed therein coaxial with and on opposite ends of the said opening in said core and for the reception of said supporting member.

ROBERT J. DUNN. 

